BIOL110s05-36 - BIOL 110: Principles of Biology Spring 2005...

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1 BIOL 110 : Principles of Biology Spring 2005 Lecture 36, F 4/29/05 http://www.smccd.net/accounts/staplesn/biol110/ EXTRA CREDIT : Stanford U. Community Lecture Series Wed, 5/4/05, 7pm: “50 Years of Computational Biology” Clark Center Auditorium: www.med.stanford.edu/maps/sumc.html 1 page summary. 15 points, + 5 if you ask a question (include in summmary) Week 14 Lab assignments due next week, for In-Lab Discussion (Environmental Issues)!! (SIGN UP!!!) • Week 15 Field Trip: Edgewood Park – Grade for participation & Worksheet!!! (Replace 1 quiz!!!) Next: 18 (bits of 19), 25, 23 REVIEW: Ch. 18 (19): • Leaf Structure TODAY: Ch. 18 (19): – Vascular cylinder: • Xylem = water transport, Phloem = Sugar transport – Reproductive physiology
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2 Casparian strip vascular cylinder in root cortex; water molecules pass through and between walls of cells Casparian Strip Vascular cylinder Cortex Only way that water and solutes enter VC VI. Plant Nutritional Requirements • Nearly all plants are photoautotrophs • Require carbon dioxide, water, minerals • Many aspects of plant structure are responses to low concentrations of these vital resources in the environment
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3 Soil • Minerals mixed with humus – Minerals come from weathering of rock Humus is decomposing organic material • Composition of soil varies
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BIOL110s05-36 - BIOL 110: Principles of Biology Spring 2005...

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